I have a peripheral that communicates with the PC over rs232. I have created a singleton ATL control object that communicates with this peripheral over the COM port.
I would now like to be able to implement this ATL object in a service .EXE and make sure that this service is started at boot, and that the singleton object is created immediately (even without any clients). This is so that my ATL object will then enable the peripheral to communicate with my object for management, even though there are no clients that need/use my object at the moment.
I have created the service project and included my object as a singleton. I am noticing that the default project settings/behaviour, is to register the service as startup on demand, instead of always/at boot. I am also noticing of course, that no service is started and no object is created until the first client requests my object.
I think I need some pointers on how to change my service register function from startup on demand to startup always/at boot. I also would like to know if there is any way I can create my singleton myself in the service process immediately, without waiting to wait for a client to request my object.
Any thoughts appreciated.
Thanks,
HalfAsleep
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I will check the links, but just to clarify, I want the service to run at boot. A wizard generated atl service project will register the service as "start on demand". Also, I want to create my singleton object as the service starts at boot, and not wait until the first client asks for an instance of my object.
They are often loaded at bootup, before any user logs in, and are often independent of any specific user being logged on at the time. If a service is not launched automatically by the system at boot time, as many services are, it can also be manually launched by a user at the console, via the NT Control Panel's Services applet, or by another program which interfaces to NT's Service Control Manager.
This looks like an example of how to se the auto-start flag:
http://code.google.co
This is code from a TCP server, but the mechanisms should be the same. It boils down to:
In your RegisterAppId override, do OpenSCManager, LockServiceDatabase, OpenService, and then ChangeServiceConfig
Thank you for your information. So far, these answers only cover the changing of the service startup from on demand to at boot.
Do you have any thoughts on how to instanticate my ATL object, before a client asks for it? This is because the ATL object also creates a worker thread that allows my peripheral to communicate over tcp/ip, even though there are not clients that are interested in using my peripheral yet. So, I would like to get my singleton ATL object up and running immediately, to "work" towards my perhipheral, even though there are no clients that have asked for an instance of my ATL object yet (which is usually when windows starts the service and instantiates my object).
Cheers!
HalfAsleep
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by: DeepuAbrahamKPosted on 2009-08-10 at 19:40:43ID: 25065819
Have a look at the following link and the code:
http://www.codeguru.com/cp
http://www.codeguru.com/cp
NT services will run in System mode, ie, before any user logs into the system it starts and it will run through out until admin user stops it.
Best Regards,
Deepu Abraham K